Synthesis and evaluation of Double-Decker Silsesquioxanes as modifying agent for epoxy resin

- Two kinds of epoxy group containing Double-Decker Silsesquioxanes were synthesized.
- theThe effects of DDSQs in the curing of DGEBA/33DDS were studied with changing effective activity energy.
- The performance of epoxy resin with different DDSQ loading ratios was studied, including thermal and mechanical properties.

In this paper, we synthesized two types of epoxy group containing POSS derivatives: mono and poly Double-Decker Silsesquioxanes (mono DDSQ and poly DDSQ). The performance of epoxy resin with different DDSQ loading ratios was investigated, including curing kinetics, thermal, mechanical and surface properties. Both mono and poly DDSQ significantly improved thermal and mechanical properties of the epoxy thermosets. The mono DDSQ showed more flexible structure and toughened the epoxy resin better, while the branched poly DDSQ exhibited better thermal resistance. In addition, the DDSQ altered surface of the epoxy resin from hydrophilic to hydrophobic.

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